* {
  padding: 0;
  margin: 0;
}
ul {
  list-style: none;
}
.box {
  width: 1400px;
  height: 800px;
  margin: 0 auto;
  border: solid;
}
.box-header {
  height: 100px;
  background-color: red;
}
.box-main {
  height: 650px;
  display: flex;
}
.box-main-left {
  flex: 1;
  height: 650px;
  background-color: pink;
}
.box-main-left ul li:hover {
  color: green;
}
.box-main-left ul li:active {
  color: orange;
}
.box-main-right {
  flex: 2;
  height: 650px;
}
.box-footer {
  height: 50px;
  background-color: orange;
}
